Stop mechanism for film-perforators and other apparatus.



A. S. HOWELL. s10?- MECHANISM FOR FILM PERFORATORS AND OTHER APPARATUS.

APPLICATION FILED MAR. 2.1917.

m mm .m J n m m Kw A. S. HOWELL. STOP MECHANISM FOR FILM PERFORATORS AND OTHER APPARATUS.

16,191 HEET 2- Patented Apr.

' 3 S H E E T 8-8 aazizaw a A. STFI'QWELL. STOP MECHANISM FOR FILM PERFORATORS AND OTHER APPARATUS.

APPLICATION FILED MAR. 2. I911.

Patented Apr. 16. 1918.

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L. n 1 w L m mat .NN A A w nr u rnn strains PAT N O ALBER'IIS. HOWELL, OF CHICAGO, IL INOIs, ASSIGNOR '10 BELL agnownnr. oomrm,

- or CHICAGO, ILLINOIS, A CORPORATION or ILLINOIS.

s'ror MECHANISM FOR rItM-rnaroaA'roas AND OTHER APPARATUS.

Application filed March 2, 19in Serial in. 152,011.

operations in the divers processes are usually performed in a dark room where the illumination 1s by means of anona'ctinic arid subdued. llght, and consequently most of the apparatus for performing these operations must be capable of automatically stopping at desired and predetermined points and without the liability of spoiling any portions of the film strips. It is'with this in view' that I have designed the hereinafter.

described stop mechanism that'is adapted to be installed upon suitable apparatus ems piplyed in the handling of cinematographic More particularly my invention relates to an automatic stop mechanism for use upon film tperforating apparatus, such as is disclose in my copendlng application for Let:

ters Patent of the United States, filed March- 2', 1917, Serial No. 152,009 for an Automatic film perforator, and its companion application, filed March'2, 1917, Serial No.

152,010, for a Bed or. table for film perforators, to both of which reference is here.

made for an understanding of the ada tability of my present invention, althoug it ,will'be understood the stop mechanism .is capable of use on other apparatus.

' Among the objects of my invention is the provision of a stop mechanism that is capable of adjustment in order that the devices for actuating the punches may' be stopped instantly upon the end of the stu ,of film being reached; to provide an ind1- '"r'aator or alarm that will notify the o erator or attendant as soon as the end of t e film strip is reached, so that a new strip may be 1 inserted for perforation; and to provide a device of this character that is dependable in its operation, simple in its construction, and economical to manufacture, and having a maximum of efiiciency. with a minimum of parts.

specification of Letters Patent. Patented Apr. 1918.

I prefer to accomplish the divers objects of my invention substantially by the means and in the manner hereinafter fully described and as more particularly pointed out in the claims, reference beinghad to the accompanying drawings forming a part of this Specification in which,- 1

Figure 1 is a side elevation of'jm'y stop mechanism shown attached to a perforating machine adjacent a film supply spool, illustrating the relative position of the parts when the machine is stopped. f

Fig. 2 is a similar view showing the parts in their relative adjusted position during the operation of the machine, the filmengaging arm, however, being raised to a vertical position.

Fig. 3 is a top plan of the structure shown in Figs. 1 and 2.

Fig. 4 is a view of a fragmentary portion of a] film spool and disk, illustrating the relation of the film engaging'arm with respect "to the film strip;

Fig. 5 is. a detail View of the element for actuating the switch plunger. In the drawings similar reference characters are employed to designate the same parts throughout the divers figures thereof.

Referring more particularly to Fi 1,.2,

and 3 of the drawings, 10re resents t e supporting frame that is pre eraibly provided with an arm 11' in the outer fiend of which latter a s indle 12 is mounted and. to one face of w ich a disk.13 issecured to afford res ectively an'arborand a guide fora spool of 1m 14. The. core 15 of the spool of film is inserted on the spindle 12 in the usual manner so that the edge of the film wound upon the same will contact the adjacent surface of disk13;

Suitable hollow bearing bosses 16and 17 a projecting from opposite sides of 'frame'lO,

provide means for journaling a short'rock shaft 18, one end whereof projects beyondthe end of bearing 17 and has the adjacent end of an arm 19 secured thereto. The opposite end of this arm 19 terminates at a point adjacent stud 12 and has a film engaging roller 20 journaled laterally thereon. This roller is of the ordinary spool type in order that'only the margins of the film on spindle 12 will be engaged thereby and has a relatively wide flange 21, that is adapted to rest against the edges of the coiled film on said spindle opposite disk 13.

The opposite end of rock-shaft 18 extends through bearing 16 and has a sleeve 22 mounted thereon and keyed thereto so as.

to be moved simultaneously with said rockshaft and arm. A short arm or embossment 23 extends from one side of sleeve 22 and a pin 24 projects outwardly from said embossmen't in a horizontal plane above the horizontal plane of the axis of rock-shaft 18. This pin is so disposed as to have one end of a coiled contraction spring 25 secured thereto and the opposite end of said spring is secured to the outer end of a stud 26 projecting from-the upper edge of the lateral arm 11 of the frame, the tension exerted by said spring being adapted to rock the shaft 18 so as to press the roller 20 down against the film on the'spool. The

disposition of the spring 25 is such that when shaft 18' is rocked sufliciently to cause the pin 24 to pass the dead center with respect to the rock-shaft and stud 26, the arm 19 will be moved to and retained in a substantially vertical position, as shown in Fig. 2 of the drawings. e

cured to the frame below shaft 18 is a suitable electric switch 27 of the snap type, that is inclosed within a boxlike hous-. .ing 23 that is provided in with an opening 29, through which the opcrating button 30 of said switch projects,

while the circuit wires 31, 31 leading to and from said switch pass through insulatmgbushings 32, 32 in the opposite wall of said housing. An operating plunger 33 for said switch buttonis reciprocally mounted in suitable vertically alining bored brackets 34, 34, projecting laterally from the frame 10 above said housing, and the lower end of said plunger is rovided with a downwardly projectings otted plate 35 that connects the switch button with said plunger and permlts the switch to be actuated ,by said plunger.- The upper portion of, the plunger extends above 1ts upper bracket and 1s knurled or milled to provide a hand. grasp 36, while intermediate the brackets said plunger is provided with a longitudi-' nally elongated slot 37, in which a small anti-friction disk or. roller 38 is journaled. Loosely mounted upon rock-shaft 18 between bearing 16 and the adjacent end of latter.

its upper wallnaeaert sists of a suitably shaped disk 39 that is provided with a pair of fingers 40, 40, that extend into the slot 37 in the plunger and engage opposite segments of t e anti-friction disk 38', and is also provided with a single finger 41, the object whereof willbe later described.

Carried by the embossment 23, on sleeve 22, is a hollow barrel 42, in which a threaded bolt 44 is disposed .so that its enlarged or conical shaped head 43 projects out of the end of the bore of said barrel adjacent the finger 41, and is adapted to engage the A coiled spring46 is adapted to be compressed between said head 43 and the opposite end of the boreof said barrel, and a lock nut 45 is mounted upon the extended threaded end of the bolt 44 to prevent its accidental rotation, the adjustment of said bolt being for the purpose of regulating the relative movement of the rock-shaft and disk 39 with respect to the moment of the snapping of the switch 27 by the plunger,

its arm 19 are raised so that the spring 25 will hold them in an elevated or vertical position (Fig. 2), and after the spool has been positioned, said armis lowered until the roller engages and rests upon an upper segment of the roll of film. The plunger 33 is now raised by its hand grasp 36, thus opening the switch and permitting the motor to actuate the drive shaft or other operating mechanism it is adapted to drive, and it will be seen that this movement of plunger'33 will cause the disk 39 to be moved upwardly until its finger 41 is in close proximity to the conical head 43 of bolt 44, providing the necessary adjustment of the latter has been made. The operating mechanism withdraws film from the roll constantly reducing the diameter of the V latter and causing the roller 20 and its arm 19 to be lowered and consequently the shaft 18 rocked, which latter will move the bolt head 43 against the finger 41 of disk 39, and thereby, through the upper one of the pair of fingers 40, push down the plunger 33. Proper adjustment having been made to the bolt 44,-it will be found that when the final or innermost coil of the roll of film is unwound from the spool, the

causing a spring or wire 47, disposed laterothers skilled in the art of my invention, that divers modifications or refinements may be made thereto without materially departing from the spirit of. my invention.

I desire it to be understood that all such changes are contemplated as included within the scope of my invention as expressed in the appended claims. 7

What I claim as new is 1. Stop mechanism comprising a switch, a reciprocable member adapted to operate the. same, and devices for actuating said member consisting of a rocking element, a gravity operated arm connected to said element, and a roll of film supporting the free end of said arm, the unwinding of said roll adapted to change the relative position of said arm whereby said member is reciprocated to operate said switch..

2. Stop mechanism comprising a switch, a reciprocable plunger adapted to operate the same, a rock-shaft, a device mounted on said shaft and adapted to cooperate withsaid plunger, an arm secured to said rockshaft, and a roll of film supportin the free end of said :arm the unwinding 0 which is I adapted to change the relative position of said arm whereby said device is moved to reciprocate said switch operating plunger. 3. Stop mechanism comprising a switch,

a reciprocable plun er adapted tooperate a rock shat, a device cooperating with said plunger, and means carried by said rock-shaft for causing a cooperation between .said device and said. rock-shaft, one member whereof cooperates with a roll of film whereby the unwinding of saidroll causes a movement of said shaft which movement is transmitted to said switch op erating plunger.

' 4. The combination with an arbor adapted to receive a roll of film, of a switch, and means for actuating said switch consisting of a reciprocable member, a rock-shaft, a pivoted device movable with said reciprocable member, an arm mounted on s'aid'rock shaft the free end whereof moves with respect to said film and is controlled there and ;means operativel'y' connecting said I shaft and said pivoted device wherebywhen said am has reached a predetermined osition said device will actuate said-mem er a and cause said switch to be operated.

'5. Thecombination with an arbor adapt-.v

ed to receive a roll of film, of a switch, and meansfor actuating said switch consisting of a reciprocable plunger, a rock-shaft, a

trigger cooperating with said plunger, an

arm mounted on said rock-shaft the free end whereof moves with respect to said film and is controlled thereby, and an adjustable device carried by said rock-shaft and adapted to engage said trigger and thereby actuate said plunger.

6. Mechanism of the'kinddescribed comengaging arm, a trigger-piece pivoted adjacent said arm, means carried by said arm for engaging said trigger, and a switch operating member adapted to be engaged by said trigger and actuated thereby.

7. Mechanism of the kind described comeratingmember adapted tov be engaged by said trigger and actuated thereby.

e. Mechanism of the kind described camprising a film holding arbor, aipivoted film prising a film holding arbor, a pivoted film engaging arm, a. trigger-piece rotatably mounted upon the pivot of said am, means carried by said arm for engaging said trigget, and a switch operating member adapt-- ed to be'engaged by said trigger and actuated thereby.

9. Mechanism of the kind describe doomprising a film holding arbor, a pivoted film I prising a film holding arbor, a pivoted film engaging arm, a spring adapted to hold sald arm yieldingly-in coaction with said film, a trigger-piece rotatably mounted-upon the pivot of said arm-,adjustable means actuated by said arm for engaging the trigger, and a switch operating rod adapted to be engaged by said trigger and actuated I thereby.

11. Stop mechanism comprising a switch, a reciprocable plunger adapted to operate the same, a rock-shaft, a trigger loosely mounted on said shaft and adapted to'cooperate with said plunger, an arm secured to said shaft the free end whereof rests upon the outer coil of a roll of film and 1s controlled thereby, and'an adjustable de- ;vice carried by said rock-shaft and adapted to actuate said trigger.

arec'iprocable plunger adapted to operate the same, a rock-s mounted-on said shaft and adapted to oo- 12. Stop mechanism comprising a switch,

aft, a trigger loosely operate with said plnnger, antarm secured Signed at Chicago, county of Cook and to said shaft the free end whereof rests State of Illinois, the 27th day of February,

upon the outer coil of a roll of film and is 1917. controlled thereby, a sleeve secured to said ALBERT S. HOWELL. rock-shaft, and an adjustable bolt mounted Witnesses: V on said sleeve one end whereof is adapted E. K. LUNDY, Jr.,

to engage and actuate said trigger. H. SLACK. 

